TotalFinder is pretty stable

I have been using TotalFinder for more than month now and I have no crash-related issues so far. Even system restarting is peaceful (since version 0.3).
There are maybe some window activation issues. For example when you do CMD+TAB, TotalFinder's main window should slide up in my opinion.
Or when some app wants to open folder in Finder, it should not open brand new window, but reuse TotalFinder
and slide up instead. But these are details I will work out during next month(s).

Tabs would be great

Do you remember tabs in a title bar from Safari 4 beta?

I know it is against usability, but Visor and TotalFinder are special case apps. These are system-wide windows sliding from "nowhere".
So they couldn't be treated as apps following usability guidelines anyway.
I like the idea of tabs in the title bar because it does not interfere with existing
Finder UI, I'm concerned especially about the toolbar of course. Also it is perfect fit for TotalFinder sliding from the bottom.

I'm looking for some open source implementation of Cocoa app tweaking title bar section of the main window.
Haven't found any implementation with safari-like tabs yet, but I'm going to look at the Chromium project.
Mac version of Chrome browser has nice tabs and does some kind of custom window titlebar rendering.

Please test v0.5 and better don't use Sparkle "Install and Relaunch" button, that should be fixed from 0.5 up.